BirdAnalyst
Species · Washington · BBS 2026 Release · 1966–2025

Golden Eagle Population Trend in Washington

All statesBirds of prey

Golden Eagle in Washington has edged down: down 12% on the route-weighted index since 1973.

-12%Since 1973TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
20Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
37YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Golden Eagle Trends in WashingtonNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Golden Eagle in Washington. See the full index history below.

Golden Eagle Population Forecast in Washington

If the recent trend holds, Golden Eagle in Washington is projected to stay roughly flat through 2030, near 0.04 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±49.5%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.04Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0895% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±49.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Golden Eagle in Washington is projected to stay roughly flat through 2030, near 0.04 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±49.5%, with 80% of held-out values landing inside the 95% band.19692030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.040.000.08
20270.040.000.08
20280.040.000.08
20290.040.000.08
20300.040.000.08

Golden Eagle Survey Routes in Washington

Routes recording Golden Eagle in Washington.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Keller319881969
Nighthawk220241993
Hurricane Rg220072007
Pomeroy220222013
Port Angeles119851985
Twisp120171984
Brewster120141977
Cascade Riv119981998
Asotin120252025
Winthrop120191989
Tonasket120092000
Cusick120242024
Ewan120022002
Curlew120122006
Potholes120142014
Mazama120132011
Laurier120212005
L. Wenatchee120232023
Moses Coulee120241995
Yakima120251997

Golden Eagle Population Trend in Other States

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Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.